Hypnace^.] 25 [Amhlystegium. 



Hab.— On tree trunks by streams. The Winnats, Derby {Holt 1882) ! ! Glen 

 Dole {Fergusson 1867) ! Winston bridge Teesdale, and Richmond Yorks. 

 (R. Barnes 1890) ! ! 



Var. y, depauperatum Boulay. 



Plants very slender, prostrate, rufescent or orange coloured, the branches 

 very slender, with minute distant leaves, nerve faint, very short ; capsule 

 very short and nearly straight. 



Syn. — Hypnum serpens Var. depauperatum BouL. Muse. Fr. 79 (1884). HusN, Muse, gall, 358, 

 Ambl. serpens Var. salinnm Carrington MS. 

 Ambl. Cashii R. Du Buysson Etud. de gen. Amhlystegium 8 (i88g). 



Hab. — Sandy coast. Southport sands (Wood 1859) ! ! Malahide, Dublin 

 {Carrington 1861). Hayle sands {Curnow 1885)! ! Portstewart, Co. Derry 

 {Stewart 1884) ! ! Reiss Links, Wick {Fergusson i858) ! ! 



This common moss is the centre of a group of closely allied species 

 which are very troublesome to distinguish from each other ; perhaps the 

 form and direction of the leaves, and the size of their component cells, afford 

 the best differential characters. The species is most variable, and Bridel 

 enumerates 18 varieties, most of them ill-defined forms. 



8. AMBLYSTEGIUM JURATZKiE Schimp. 



Autoicous; resembling A. serpens but more robust, deep green. 

 Leaves subsquarrose, cordate- ovate, acuminate, nerved above half 

 way, cells larger, rectangular at base. (T. XCI, A.) 



Syn. — Amhlystegium jfuratzkanum Schimp. Synops. 693 (i86o), 2 ed. 710. HusN. Muse. gall. 

 358, t. 102 (1893). Flora Batava, t. 939. 



Hypnum yuratzkamtm BouL. Muse. Fr. 74 (1884). 



Amhlystegium serpens Var. jfuratzhanum R. du Buyss. Etud. du gen, Amhlystegium 

 18 (1889). 



Autoicous ; laxly tufted, deep green ; stem creeping, rooting, with 

 short erect branches. Leaves subsquarrose, not crowded, cauline 

 cordate-ovate, longly acuminate, acute, branch-leaves narrower, 

 lanceolate-acuminate, nerved for f length, margin entire or feebly 

 denticulate; cells laxer, elongato-rhomboid, basal quadrato-rectangular. 

 Perich. bracts elongato-lanceolate, less suddenly acuminate, nerved, 

 plicate; capsule subarcuate-cernuous, contracted below mouth, finally 

 ferruginous, lid conic, apiculate, teeth orange with a hyaline border, 

 endostome pale yellow. 



